WATT CPC Duo Medium

Flat solar collectors

The collectors produced by us are based on the German absorber ETA PLUS of company BLUETEC. This absorber is peak achievement in world solar technology.

Advantage of WATT 3000S collector

• high reliability
• high watt-hour efficiency
• long life
• made of corrosion resistant materials (aluminum, copper)
• low price

Absorber is the „heart” of the solar collector. Collector heat gain depends on used absorption surface. In eighties the world market was dominated by aluminum or copper absorbing sheets covered with galvanized film of black chromium or nickel. Since about 1995 highly selective absorber surface have been used.

Emission factor (reflection of solar rays) is lower than 5%, absorptivity degree amounts to 95%.

Solar collectors produced in Poland are based mainly on black chromium absorber. According to research at University in Stuttgart covering of Sunselect or Tinox (high selective) increases solar collectors effectiveness of 10% annually, and in transition periods as well as in winter even of 16%. In the below drawing you can find percentage efficiency increase of collector with Sunselect absorber in comparison with black chromium, in separate months of the year.

That is why installation of solar collectors produced by our company allows for gaining more energy savings.

Vacuum solar collectors

Collector WATT CPC

Usage of vacuum glass pipes usage is distinguishing feature of WATT CPC collectors. Regardless of the fact that pipes construction is based on James Dewar’s invention of vacuum bottle of 1893, today their production uses the newest technologies.

Vacuum pipes

Collectors produced by WATT are based on pipes, which consist of double-wall glass pipes with vacuum between the walls. The vacuum guarantees the best insulation in all weather conditions. Thanks to that no heat loss is observed by outer pipe wall.

Inner wall is covered with absorption film with very high absorptivity and minimum emission of solar radiation. The absorber used enables to absorb scattered radiation. The pipes are resistant to various climatic conditions, hailstorm – they are made of hardened glass.

CPC mirror

Placing glass pipes over highly-reflective CPC parabolic mirror (Compound Parabolic Concentrator) is an advantage of CPC collectors which enables maximum usage of solar energy; the mirror geometry ensures absorption of solar rays placed at disadvantageous angle, as well as guarantees usage of the whole absorber surface for gaining solar radiaton.

Optimum construction and assembly.

• Possibility of assembly on skew, flat roof, as free-standing as well as on building wall
• Wide possibility of application thanks to various collector modules with various width
• Very elegant look and design
• Pipes exchange without necessity of collector emptying
• Housing and fixings made of corrosion-resistant materials such as: aluminum, borosilicate glass, copper, sealings UV-proof.